运河的保护强化了杭州的历史个性，同时优化了城市生态环境，也提升了城市生活质量。
The canal protection serves its purpose as to heighten the historical individuality of Hangzhou, optimize the urban ecological environment, and elevate the quality of its urban life.
保护系统（即生化恐怖袭击的应对操作和技术强化方案）的确切技术套件尚未公诸于世。
The exact suite of technologies in PROTECT, which stands for Program for Response Operations and Technology Enhancements for Chemical/Biological Terrorism, is not made public.
保险库采用密码加钥匙的双重保护系统，并使用厚达两英尺的强化钢板。
The vault itself was protected by a dual lock system: a combination and a key lock, and two feet of reinforced steel.
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